Project 1. Airduct Noise Cancellation

Audible reduction (40%) has been achieved on our experimental multi-speaker cancellation system with a 3m long laboratory aluminium air-duct made more realistic with a couple of extra bends:

Project 2. Local noise cancellation in cabin interieur

Active noise cancellation within a small size wooden cabin was successful up to 70% in the centre of the cabin.

Project 3. Local noise cancellation in rooms

Multi-channel sound control in the Dual Chamber has been built to experiment with local noise cancellation using two 16-microphone array and 16-speaker array. This experimental setup is also used to test multichannel fast learning robust control algorithms.

Use of piezoelectric actuators to reduce vibration of plates (instrument housing, glass, PCBs, etc.). The experimental set-up uses two sensors and one actuator to neutralise the sound-induced vibration of a window glass:

Use of electro-mechanical actuators to reduce vibration of plates (instrument housing, glass, PCBs, etc.). The experimental set-up uses one sensor and one actuator to neutralise the sound-induced vibration of a window glass:

Project 5. Active vibration reduction of machine plates

Demonstration facility of the delayed resonator principle to reduce vibration of machine plates. Electromechanical actuators and LVDTs have been used: